There could be a crossover somewhere in the system and you won't get full range out of your new speaker. I buy from Crutchfield because they know exactly what goes in each spot and will include any adapters needed for your vehicle.
So in the rear the uppers are now 2" shorter than lowers? What is the difference in the front? What are your anti squat/anti dive numbers if you don't mind? I'm working on my first f/r 4 link and I'm curious what works good in our area.
Study the window sticker for these.
Private should = invite only for event participants.
Otherwise the wrong person will hear about it at the local watercooler and register to get the dirt on you.
Don't get me wrong the idea is spectacular you're just starting it on the wrong foot.